What upscale SLR cameras utilize user-activated (or automatically selected) visual indicators within the scene area of the viewfinder, superimposed over the image of the subject? For example, the Canon EOS series has a series of autofocus areas in the center of the focusing screen that are black rectangles until one, or more, is/are selected, at which time it/they become illuminated in red.

I think certain Nikon models do a similar thing.

The point is, I have reason to believe that cameras that have this feature infringe upon one of my patents. I have already reached a satisfactory settlement with one major Japanese camera corporation regarding active viewfinder indicia and would like to pursue the rest of the bunch.